Jacques Bernis, pilot of the Air France Coy, ensures the mail France-Dakar. He returns to France for permission, sees a friend of childhood, Genevieve, married to a diplomat and unhappy. Emu of the confidences of Genevieve that he still loves, Jacques goes with her and hides in Paris. However, an order from the company urgently reminds jacques for a mission that he alone can accomplish. Jacques leaves on his plane. Arrived in Casablanca, he learns that a comrade is in danger, fallen among the dissidents. Jacques does not hesitate and goes back to the rescue of his comrade, saves him, as well as the mail. But it is he who will fall under enemy bullets. Genevieve learns of her death and returns to her husband.